On a clear evening, if you look up you can see thousands of stars shining in the sky, each with a story of their own. Taking 21 stars (and three that technically aren't), Giles Sparrow offers a complete introduction to what is happening up in the night sky. Sparrow draws star maps to help you easily identify the celestial bodies—including red giants, supernovae, and quasars—and then explains what this particular pinprick of light can tell us about our universe.